可编程增益多通道数据采集系统研究

本文提出了一种利用现场可编程门阵列（FPGA）、仪表运算放大器AD623和高精度AD转换器实现多通道数据数据采集系统的原理.通过对FPGA进行编程配置,可以对不同通道输入的伏值不同的电压信号分别设置增益,使每一个通道输出的信号正好在AD采集所需要的信号范围内,满足了采集要求.实验结果表明该设计结构简单、体积小、适用性强、性能优良、可控性好、能够满足大部分试验和科研过程的需求,具有很广泛的适用性.

The research on programmable Gain and Multi-channel Data Acquisition System

The theory and method are discussed based on Field programmable Gate Array (FPGA), instrumentation amplifier AD623 and high precision ADC in this thesis. Through programming to FPGA, the gain of different channel and different type analog signal can be settled, and make sure every channel of the output signal in AD gathering on the range of needed signal and meet the gath-ering requirements. The experimental results show that the design is simple and its volume is small, applicability is excellent and controllability is good and it can meet the demand of the majority of experiments and scientific researches and has good extensive ap-plicability.